. >>> there may be no more constitutional couldn't verse yee than the right to bear arms and the devil is in the details and for decades americans have argued which arms we should be allowed to bear. jeffrey toobin is author of "the oath" and senior legal analyst. he's joining us from new york. here's what the constitution, the second amendment says, you know this well. a well regulated militia being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed. over the years, as you well know, jeffrey, this has gone through a lot of interpretations. most recently in 2008. >> very dramatically different interpretations. before 2008, for 100 years, that first clause, the so-called militia clause, was read by the supreme court and other courts to trump the right to keep and bear arms. that amendment was interpreted for decades as giving individuals no right to keep and bear arms. in 2008, that changed on a dime. the united states supreme court in a decision called hellar said that the second amendment gives individuals the right to keep